Acoustics

Acoustic reflexes are contractions of the stapedius muscle in the middle ear. This reflex occurs when a loud sound is presented to the ear causing the tympanic membrane to stiffen and cause a change in immittance (Martin & Clark, 2012). When measuring the acoustic reflex threshold, we are measuring the softest sound that can cause a reflex of the stapedius muscle as well as the duration of time needed for the reflex to decay. The reflex is presented as a deflection, or a curve/dip, on the…

As such a versatile instrument, the sound of the acoustic guitar ranges from the rhythmic undulations of reggae to the heartfelt yearnings of a simple ballad. This instrument does not emanate its rich tones and overtones from the soundhole alone. This is a whole-instrument affair. Sound projects from the panels of the body, the strings and even from the resonating fretboard. As we explore the fine skill of recording acoustic guitar, keep this in mind. Start with the guitar and player We all…

extension of myself. It is who I am. ______ Joan Jett You need an acoustic guitar but not an ordinary one. You need one which is the best acoustic guitar for you. Keep in mind that different people playing style, and tonal perception is different. A guitar which one is perfect for your friend may not be the best acoustic guitar for you. You have to find out one which is perfect for you. Let’s face the truth. Finding the best acoustic guitar is not easy. If you are a complete newbie and don’t…

An acoustic guitar is a musical instrument that produces sound through strings’ vibration. At different frequencies strings vibrate creating harmonic tunes. The strings mass, length and tension determine the frequency produced. The guitar is very popular in music today and a useful part of classical, reggae, blues and other genres. The guitar ancestry draws back to Arab countries, where an instrument with many strings and a gourd sized body was brought from Spain. It was called an alu’de. This…

Most people understand that fetuses are extremely fragile and should not be exposed to ionizing radiation; thus, health care providers utilize ultrasound for prenatal imaging. But how safe is ultrasound imaging? Is it safe enough to warrant a fetus’s exposure? Sonography is a safe choice for prenatal imaging, but there are some suspected risks involved. However, the benefits outweigh those risks as long as scans are completed appropriately, especially when it comes to the 3­D and 4­D ultrasounds…

Ultrasounds date all the way back to the year 1958. Ultrasounds use noninvasive waves, that go through the body, so others can see inside of that person’s body. One of the amazing things about ultrasounds, is that they have a frequency of 20 kHz of 20,000 Hz. This paper will talk about what ultrasounds are, how we use them, what is the application of an ultrasound in medicine, how each part works in the ultrasound machine. Another thing that this paper will be talking about, would be why…

to scuba divers using communication equipment has contributed to NOC developing speech mimicking capabilities. Due to these instances, NOC’s caretakers began recording his speech mimicking both under and above the surface of the water. Through these recordings, it was found that the rhythm of NOC’s speech amplitude and vocal bursts were similar to that of a human’s. Additionally, NOC would make, on average, three vocalizations per second with a break of 0.05 to 0.5 seconds between each.…

A Closer Look at Spasmodic Dysphonia Approximately 7.5 million Americans suffer from a voice disorder (NIDCD). Voice disorders are speech disorders characterized by irregular pitch, loudness, duration, and vocal quality that are inappropriate for an individual’s age or gender (ASHA-Def of communication disorders and variations). Voice disorders are broken into three categories: functional, organic, or both. Organic voice disorders are broken down even further into structural and…

A speech sound disorder incudes problems with articulation and phonological processes that persist beyond the age of acquisition. A speech sound disorder can affect both children and adults, and subsequently can have a social or educational impact on individuals across the lifespan. Speech-Language Pathologists have taken an influential role in treating speech sound disorders. Treating the various speech sound disorders related to articulation and phonological disorders is important due to the…

Sound travels through matter, which is a solid, liquid or gas. Sound travels in longitudinal waves. There is also a vibration that starts on an object, and this causes a vibration on all the molecules. When these molecules vibrate, they cause all of the other surrounding molecules to vibrate. This vibration will spread from molecule to molecule causing sound to travel. 1. What is a wave? A wave is a chain of vibrating molecules. In general, a wave transfers energy from one place to another. 2.…